Method for fast automatic modeling of power transmission lines

Abstract

The application discloses a power transmission line rapid automatic modeling method, which realizes rapid automatic modeling of the power transmission line based on a tower model library and line account information, establishes a typical tower three-dimensional model library file according to a tower model recorded by the line account information and height information contained by the tower model, and connects information into the library, automatically calculates a tower direction and a scale according to a tower number and spatial position coordinates, generates a ground wire vector information, and constructs a power transmission line three-dimensional model to provide data support for three-dimensional model display of the power transmission line body.

Description

Technical Field

[0001] This invention relates to the field of power technology, and more specifically to a method for rapid automated modeling of transmission lines. Background Technology

[0002] Currently, with my country's rapid economic development, due to the uneven distribution of regional energy demand and production, a large number of ultra-high voltage, high-power, and long-distance transmission lines have become the backbone of the power grid. More and more of these operational lines are located far from towns and major transportation routes, traversing high mountains and rugged terrains, creating complex geographical environments and harsh natural conditions, which pose significant challenges to the operation and maintenance of these transmission lines. Furthermore, with the increasing length of transmission lines, the length of lines maintained by individual personnel has become the norm for line maintenance work, bringing even greater challenges to line operation and maintenance. Accurate reverse modeling of transmission line towers and conductors, presenting them as 3D solid models, can realistically demonstrate the operational status of the transmission line itself, providing strong data support for line operation and maintenance.

[0003] With advancements in data acquisition and remote sensing technologies, helicopter / UAV intelligent power line inspection has become an efficient inspection technology both domestically and internationally. Utilizing laser scanning, aerial photography, and oblique photography techniques, it directly acquires high-precision 3D laser point clouds and high-resolution aerial digital images of the power line corridor. This allows for the acquisition of high-precision 3D spatial information on the corridor's terrain, topography, features, and power line facilities, including tower locations, anchor points, and conductor sag. This provides a data foundation for subsequent work such as accurate and low-cost power line modeling, human-machine interaction in the 3D environment, the linkage between the 3D environment and related data, and 3D visualization analysis of the power line. However, in practice, due to airspace limitations, weather conditions, or complex geographical environments, intelligent inspections may not be possible in the short term, thus preventing the acquisition of the aforementioned data and hindering the 3D visualization modeling and analysis of power transmission lines.

[0004] Meanwhile, existing 3D solid modeling technologies and algorithms for transmission lines have the following drawbacks: existing manual modeling methods are inefficient and have a low degree of automation; traditional 3D solid modeling methods are largely affected by human factors, often requiring rework and with uncontrollable errors; the models generated by traditional manual modeling methods are all solid models, which are not reusable, resulting in a large amount of data and creating a data burden for subsequent 3D applications.

[0005] Therefore, how to reduce the impact of environmental factors on power transmission line modeling and improve the efficiency, accuracy, and automation of 3D solid modeling is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a rapid automated modeling method for transmission lines, which realizes rapid automated modeling of transmission lines based on a tower model library and line ledger information. This method is practical and applicable, and has high practical application value.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A rapid and automated modeling method for power transmission lines includes the following steps:

[0009] Step 1: Collect transmission line ledger information and drawing information, and organize and import the line tower data table into the modeling database;

[0010] Step 2: Use the line tower data table, the transmission line ledger information, and the drawing information to perform 3D modeling of the tower, obtain the tower model, and generate a tower 3D model library file;

[0011] Step 3: Organize the hanging point information of the tower model, and obtain the tower model definition data table based on the model name corresponding to the tower model, the tower 3D model library file, and the hanging point information;

[0012] Step 4: Automatically calculate the tower orientation and scaling information based on the tower data table, the tower 3D model library file, and the tower model definition data table, and obtain the conductor vector data;

[0013] Step 5: Load and render the tower model and the conductor vector data to display the transmission line model in three dimensions.

[0014] Preferably, the transmission line ledger information includes pole and tower ledger information and insulator ledger information. The pole and tower ledger information includes serial number, pole number, line name (or line ID), longitude, latitude, elevation (tower base elevation value), pole and tower model, call height, and total tower height, which are compiled into the line pole and tower data table. The insulator ledger information includes insulator model, length, and material, etc. The pole and tower model includes call height. The drawing information includes drawings, photographs, and other materials of poles, insulators, and hardware. The line pole and tower data table describes relevant information about the pole and tower body, and inaccurate or missing data has been filtered out.

[0015] Preferably, in step 2, based on the insulator ledger information and drawing information collected in step 1, combined with the line tower data table, and according to the tower models recorded in the line tower data table, a 3D solid model of a typical tower model is created in commercial modeling software to obtain the tower model and generate a 3D tower model library file. The tower modeling content includes the tower, insulator, hardware, drain wire, and tower foundation. Only one shared model file is created for each model, and a 3D tower model library file is generated for each tower model created. The file is named according to the tower model name. The modeling environment is set with a unified unit, and the length unit is "meter (m)," accurate to three decimal places. The tower model adopts a right-handed rectangular coordinate system, with the origin located at the center point of the tower foot. Insulators and hardware constitute an insulator string.

[0016] Preferably, the tower model data table includes ID, tower model name, location, phase, sequence number, and (x, y, z) coordinate values. Here, ID refers to the sequence number of the data in the database table; the tower model name is the abbreviation or designation of the tower model; the location, phase, and sequence number are the hanging point information of the insulator string in the tower model; and the coordinate values ​​are directly obtained from the corresponding coordinate point values ​​in 3ds Max software, in meters (m).

[0017] Preferably, in step 4, the conductor-to-ground wire consists of a conductor and an overhead ground wire. Considering the characteristics of the overhead conductor-to-ground wire's catenary curve, which conforms to a hyperbolic cosine function, the conductor-to-ground wire vector data is calculated based on the tower location coordinates (longitude and latitude) and tower model from the line tower data table, combined with the tower 3D model library file. Based on the tower coordinates, the line direction is calculated, and the angle bisector of the line direction is the tower's orientation value. The tower's total height is divided by the tower model height recorded in the tower 3D model library file to obtain the tower model scaling ratio.

[0018]

[0019] In the above formula, y is the vertical coordinate of the position coordinate system, in meters (m); x is the horizontal coordinate of the position coordinate system, in meters (m); g is the specific load of the conductor, in N / m·mm²; and σ0 is the stress at the lowest point of the horizontal conductor, in MPa.

[0020] Preferably, based on the line tower data table, the tower model definition data table, the tower 3D model library file, and the conductor and ground wire vector data, the tower model and conductor and ground wire vector data are loaded and rendered. The constructed tower model and the corresponding tower 3D model library file are retrieved according to the tower model information to realistically display the transmission line model. The tower model from step 2 is loaded into the 3D scene according to the information in the line tower data table. The specific loading and rendering method is built into the 3D engine, using data supported by the 3D engine and rendering through an open-source 3D engine. Based on the tower model information, model reuse information is used during 3D display to retrieve the already constructed tower model, enabling fast and efficient loading of massive amounts of data. That is, when displaying tower models of the same model, the same tower 3D model library file is referenced. Latitude and longitude coordinates, orientation, and scaling information are used to display the tower 3D model library file at the tower location, instead of generating all tower entity model files. This parameter and model referencing method reduces the amount of entity data in the 3D scene, thereby achieving fast and efficient loading of the transmission line 3D model.

[0021] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a method for rapid and automated modeling of transmission lines. Based on the tower model library and line ledger information, it realizes rapid and automated modeling of transmission lines. According to the tower model and height information recorded in the line ledger information, a typical tower model library file is established, the connection information is entered into the library, and the tower orientation and scale are automatically calculated according to the tower number and spatial location coordinates to generate conductor and ground wire vector information, providing data support for the three-dimensional model display of the transmission line body. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 The attached figure is a flowchart of the rapid automated modeling method for power transmission lines provided by the present invention;

[0024] Figure 2 The attached figure is a schematic diagram of a typical tower model provided by the present invention in three dimensions;

[0025] Figure 3 The attached figure is a schematic representation of the tower model definition data provided by the present invention;

[0026] Figure 4 The attached figure is a schematic representation of the line tower data provided by the present invention;

[0027] Figure 5 The attached figure is a schematic diagram of the line conductor and ground wire vector data provided by the present invention;

[0028] Figure 6 The attached figure is a schematic diagram of the rendering and loading of the three-dimensional model of the line provided by the present invention;

[0029] Figure 7 The attached figure is a three-dimensional schematic diagram of the power transmission line model provided by the present invention. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention discloses a method for rapid automated modeling of transmission lines, comprising the following steps:

[0032] S1: Collect transmission line ledger information and drawing information, and organize and import the line tower data table into the modeling database;

[0033] S2: Call the line tower data table, transmission line ledger information and drawing information to perform 3D modeling of the tower, obtain the tower model, and generate the tower 3D model library file;

[0034] S3: Organize the hanging point information of the tower model, and obtain the tower model definition data table based on the model name, tower 3D model library file and hanging point information;

[0035] S4: Automatically calculate the tower orientation and scaling information based on the line tower data table, tower 3D model library file, and tower model definition data table, and obtain conductor and ground wire vector data;

[0036] S5: Load and render the tower model and conductor vector data to display the transmission line model in three dimensions.

[0037] Example

[0038] S1: Collect transmission line ledger information, including tower and insulator ledger information. Tower ledger information includes serial number, tower number, line name (or line ID), longitude, latitude, elevation (tower base elevation value), tower model, call height, and total tower height, which is then compiled into a line tower data table. Insulator ledger information includes insulator model, length, and material. Drawing information includes drawings, photos, and other materials related to towers, insulators, and fittings.

[0039] S2: Typical Tower Modeling. Based on the transmission line ledger and drawing information collected in S1, 3D solid models of typical tower models are created in commercial modeling software according to the tower models recorded in the tower data table. This yields tower models and generates a 3D tower model library file. The tower modeling includes the tower, insulator strings (insulators and fittings), drain wires, and tower foundation. Only one shared model file is created for each model, and a separate 3D tower model library file is generated for each tower model. The files are named according to the tower model name. A unified unit is used in the modeling environment, with length units in meters (m), accurate to three decimal places. The tower model uses a right-handed Cartesian coordinate system, with the origin located at the center of the tower's base. Typical tower model 3D models are shown below. Figure 2 As shown;

[0040] S3: Input tower model information into the database and construct a tower model data table. The tower model data table includes ID, tower model name, location, phase, sequence number, and (x, y, z) coordinate values. Here, ID refers to the sequence number of the data in the database table; the tower model name is the abbreviation or designation of the tower model; location, phase, and sequence number are the hanging point information of the insulator strings in the tower model; the coordinate values ​​are directly obtained from the commercial modeling software for each corresponding coordinate point, in meters (m). The tower model data table is as follows: Figure 3 As shown;

[0041] S4: Automated calculation of tower orientation, scaling information, and conductor / ground wire vector data; automatically calculates tower orientation and scaling information based on the line tower data table, tower 3D model library file, and tower model definition data table; the conductor / ground wire consists of a conductor and an overhead ground wire, and considering the catenary curve characteristics of the overhead conductor / ground wire, its mathematical model conforms to a hyperbolic cosine function, therefore, the conductor / ground wire vector data can be obtained from the foundation calculations of adjacent towers that have already been extracted; the line tower data table is as follows... Figure 4 As shown, the conductor vector data is as follows: Figure 5 As shown;

[0042] S5: 3D model display of the transmission line. Based on the transmission line tower data table, tower model definition data table, tower 3D model library file, and conductor / ground wire vector data, the system loads and renders the 3D solid models of the towers and the conductor / ground wire vector data, realistically displaying the transmission line model. According to the tower model information, the system utilizes model reuse information to retrieve pre-built tower models during 3D display, enabling rapid and efficient loading of massive amounts of data. Specifically, tower models of the same model reference the same tower 3D model library file during 3D display, using latitude and longitude coordinates, orientation, and scaling information to display the tower 3D model library file at the tower location, instead of generating all tower solid model files. This parameter-based and model-referenced approach reduces the amount of entity data in the 3D scene, thus achieving rapid and efficient loading of the transmission line 3D model. Loading and rendering the tower 3D solid models and conductor / ground wire vector data realizes the rendering and loading of the transmission line 3D model. Figure 6 As shown, the 3D model of the transmission line is displayed as follows. Figure 7 As shown. Based on the tower model information, the model reuse information can be used to quickly and efficiently load massive amounts of data during 3D display.

[0043] The beneficial effects of this invention are:

[0044] 1) Traditional manual 3D modeling methods for transmission lines are inefficient and lack automation. This invention uses the same tower model file to automatically calculate tower orientation and scaling information, and achieves 3D modeling through multiple matching processes using automated 3D modeling tools.

[0045] 2) This invention has a high degree of automation. The automatic calculation and modeling is at least 10 times more efficient than the purely manual modeling method. Furthermore, the automatic calculation using precise data such as line tower data tables, tower 3D model library files, and tower model definition data tables improves the modeling accuracy and position accuracy.

[0046] 3) This invention utilizes model reuse information and uses vector data for ground wires to achieve fast and efficient loading of massive amounts of data.

[0047] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0048] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rapid and automated modeling method for transmission lines, characterized in that, Includes the following steps: Step 1: Collect transmission line ledger information and drawing information, and organize and import the line tower data table into the modeling database; Step 2: Use the line tower data table, the transmission line ledger information, and the drawing information to perform 3D modeling of the towers, obtain the tower models, and generate tower 3D model library files; create a shared model file for each model, and generate a tower 3D model library file for each tower model created, with the files named according to the tower model name; Step 3: Organize the anchor point information of the tower model. Based on the model name corresponding to the tower model, the tower 3D model library file, and the anchor point information, obtain the tower model definition data table. The tower model definition data table includes ID, tower model name, location, phase, sequence number, and coordinate value information. Step 4: Automatically calculate the tower orientation and scaling information based on the tower data table, the tower 3D model library file, and the tower model definition data table, and obtain the conductor vector data; Step 5: Load and render the tower model and the conductor / ground wire vector data to display the transmission line model in three dimensions; based on the line tower data table, the tower model definition data table, the tower 3D model library file, and the conductor / ground wire vector data, load and render the tower model and the conductor / ground wire vector data; based on the tower model information, retrieve the constructed tower model and the corresponding tower 3D model library file to generate the transmission line model; Load the tower model from step 2 into the 3D scene according to the information in the line tower data table. When displaying tower models of the same model, reference the same tower 3D model library file and use latitude and longitude coordinates, tower orientation and scaling information to display the tower 3D model library file at the tower location.

2. The rapid automated modeling method for transmission lines according to claim 1, characterized in that, The transmission line ledger information includes pole and tower ledger information and insulator ledger information; the pole and tower ledger information includes serial number, pole and tower number, line name, longitude, latitude, elevation, pole and tower model, call height and total height of pole and tower, which are organized into the line pole and tower data table; The insulator ledger information includes the insulator model, length, and material; The drawing information includes drawings and photographs of poles, insulators, and fittings.

3. The rapid automated modeling method for transmission lines according to claim 2, characterized in that, In step 2, based on the insulator ledger information and drawing information collected in step 1, combined with the line tower data table, a three-dimensional solid model is created in commercial modeling software according to the tower model recorded in the line tower data table to obtain the tower model and generate the tower three-dimensional model library file.

4. The rapid automated modeling method for transmission lines according to claim 2, characterized in that, In step 4, the conductor and ground wire consist of a conductor and an overhead ground wire. Based on the characteristics of the overhead conductor and ground wire catenary curve, which conforms to a hyperbolic cosine function, the conductor and ground wire vector data are calculated using the longitude, latitude, and tower type from the line tower data table, combined with the tower 3D model library file.

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